Tire tread depth gauge



FIG. 1 shows a perspective view of the present design.

FIG. 2 shows a front view of the present design,

FIG. 3 shows a rear view of the present design.

FIG. 4 shows a left side view of the present design

FIG. 5 shows a right side view of the present design.

FIG. 6 shows a top view of the present design; and,

FIG. 7 shows a bottom view of the present design.

The broken lines showing of structural feature is indeed for the purpose of illustrating non-claimed subject matter and forms no part of the claimed design. 

CLAIM The ornamental design for a tire tread depth gauge, as shown and described. 